chore: GPL-3.0 in package.json

Author: Kok Kek

package.json

@@ -14,7 +14,7 @@
   "bin": "build/cli/index.js",
   "repository": "https://github.com/kokkekpek/vendee",
   "author": "@kokkekpek",
-  "license": "MIT",
+  "license": "GPL-3.0",
   "engines": {
     "node": ">=14.0.0"
   },